swiss bank intervenes in forex

-In the past four to five years there hasn't
been any kind of such announcement from a
major central bank-
- The move may now open the door to foreign
exchange
interventions by other monetary authorities,
with the Bank of Japan and Sweden's central
bank possibly being the next in line-

If their intent is to combat a strong franc, where was this intervention a yr ago or even 3 months ago? In this strong USD environment, their action is kinda like opening a condom AFTER you've had sex, no?